Fastener



Nov. 16, 1943. F, PURlNTON 2,334,352

FASTENER Filed NOV. 4, 1942 2 Sheets-Sheet l x; I SDI Um flrrasi 61 102225025 NOV. 16, 1943. F PURlNTON v 2,334,352

FASTENER Filed NOV. 4, 1942 2 Sheets-Sheet 2 jib/W653 @Zarzk/Zw; e

Patented Nov. 16,1943

the cylii'idlers; so' that hereafter in the sp H f T FAS TENEB a. *sForrestrGaPirrintbngWaterbury; Coiing'asigribr 1 I .1 t i to The Patent Button Gompany waterburyi ;Oonn.-,a;corporation of Connecticut; r

" A iiflication lioverdt er 4, 1932,

t "a fastener that is 'speiallsr adapted" rly Serial N0.46f1,481

p anes andthe like.

' facture 'afiotheijbbject of tl le' invhitiorris op'fo-i vide a fastener consistingwprimari' ly ofa body of therollers are parallelfltoand offset "one o'nf each side of the axis'of the :fstutl-Qwhieh hasfooop rat f es! fl ha t ere: ro ins, pntm as the stud advances betweeri thetwo rollers N11! other wordsfbyoffsetting-f't1'1 cen'ter stu'gi advances as"it I D d a pure rolling ic ontact'and' fno sliding and'efiiciency; j v v It might be mentioned that if myliriders used in place of cories there will be an 'insi cant sliding component {between the l tio-n wherein a' pure rolling o'ontat isspoke I itwill be remembered thatif xcylipdersfar co the cylinders is so 'slight 'that-forthepqrp es of the specification the Words copes'jand' cyk finders" may be 'usedinterbharigeamy;Rf Sti11 another object of the invention is as the entering Walls, offset poftiohsto place the tion, and after the studts once looked mix/11 N we greaterth'oldihg power thari'many oth'er 'forrns of similar fasteners now izi fis'e:

Still another object of the im rftiofiisj tide a fastener utilizing-a st1id-of spebia struction and wheritr'the flcooperatingffro g" "hav n e t i tqu f omponent, thus assuring arastenerdrmngjirg from. 1

.tion consists 'in certaifll tiw *afid novel ar an e:

, a a 6. vide a fastener wheri'nthe several features, such 7 era'tions and is relatively inexpensive to manu- I I A a ter or was toth s rovide a; jniax i murn or; tohtacting H su r face rb etwee n the studs andthero llers afidals profit! a fastener nqnts an d combinatior; of parts as Wtll'he herihaft'er more 1 fully; described and pointed j oiit- 'inthe claims:

; Referringnow to the Ta-Wings gnawing rrredrarm-anq seven modification 1 1s a top "plan view member and its rollers;

wfs w ih ih 6f the Toners s ng bmittzj for: the

t j *s is a ilarvie'w but g hbwi g the stud in itsunlo ckedipositionj Fig, 6 is a sectional vi wtake-n or'ilin ts" at Fig. '1 is a smeivafion afma ma siriowiri struction. 1 V p "Iheplate D, of course, is perforated as at.63" eentrallybeneath the spaced rollers and the walls as may when the stud is. in itsrlocked position there is no. possibility of a retrograde (movement ofthe stud, as the. rollers'have rolledi.(snapped) into these relativelyshallow pockets; .Theoperation of 'thestud and its resilient member'is extremely simple, as after the two plates are placed in juxtaposition and the stud aligned so that the. rollers. will rest in the entrance. spaces, a quarter turnof the stud to the righttwill cause the cam-faces or helices 2| and 23 to .contactiwith their respective rollers and due to the helices orlworking cam surfaces, pull the rollers downwardly, exerting a tension on the spring member to thus pull the plates towards each other',*while at the end of thequarter'rotationof the stud the rollers will snap within the pockets orseats 21 and 28 andPbear against the stop walls 25 and 26, thus locking the plates. under tension to each other.

To intentionally separate the plates, however, it is only the matter of a moment to again place a coin in the kerf and turn the stud in the oppoe site direction to'rollthe cylinders out of their seats and beyond the walls22 and 24 along the helices or cam faces2l and 23 until the rollers again llefreely within the entrancefspaces l8 andl9. g As heretofore mentioned, by offsetting the rollers and having their axes parallel with the working cam faces on the stud, there is a rolling contact between the working .parts of the stud and the rollers, thus providing a minimum amount offriction. I Referring now to a. modified form the stud member is slightly different andthe resilient member also slightlydifferent from the preferred form;

concave. aS at rand mmmwha mig'htbe I plates can contact-and they: will also permit. the central portion of the spring member 1 to .bottom thereon: in case of. anuhnatdral: or severe load put onithe stud;.whichw ill.thus prevent any ex cess flexingiof the. spring to. thus avoid loading the spring-beyond its elasticlimit. c Referring-now to the stud E illustratedin de'- tail inFig. 13, it will be noticed that it is mounted invwhat willobe the'movable plateD. and cone sists'ofCthelhead fifl with-i itskerf 65, tapered side walls '66 and overhanging ledge .61. Thus, after.

the stud is placed withinthe opening $68.in :the' plate D, the walls .69 maybe rimmed'or. swedged beheaththe ledge 61 soxthat .after the .studris once. fastened to its platefi'it: cannot become accidentally disengaged therefrom. l I

"The shankmay. be reduced'as at 10 and again atits distal .end :'|l .to form the pilot, leaving the enlarged portion 12 about centrally of its length.

The periphery of the enlarged portion=tapers inwardly as at 13, and is provided with two oppositely-positioned fiat faces 14 and two small oppositely positioned depressions or. seats .15, while the far wall 1 6: of each depression extends slightly outwardly to prevent an undue turning movement of the stud and to lock the stud when the rollers are seated in thedepressionl'li heretoforementioned.

\ Theflat faces provide fortheentrance of the stud between the conical rollers. Thus, as may: be seen in Fig.113, wehave the entrance face 14' and successively, the working taperedface 13 and the seat '15 plus the stop wall. 16 andthis; of I course; is repeated on the opposite side ofthe stud. 1- A It will be i noticed Z that" the tapered working face 13. of the stud is parallel with. the working surfaces of the conical offset rollers, i so that thereis a rolling "surface at all times that "the rollers engage the working faces ofthexstud,

. thus reducing the friction to a minimum and In Fig. 9 the resilient'member consists of a 9 relatively wide metal spring'member having its ends bent in loop formation as at 5| and 52, the reente'ring ends 53 being riveted. as at 54 to their plate D. The central portion of the member is alsollpwardly bowed as at 55 thus providing the angular walls 56 andB'I centrally of the r'esilient member, and in these walls are fastened the lower ends of the pins 58. The upper ends of the pins 58 are rivetedto a likebowed plate 59'which is'centrallyperforated as at Gil -and likewise the bowed portion of the resilient member is perforated at 6| so that the stud (about to'be mentioned) may extend 'up through the resilient member 50 and likewise'the reinforcing plate59.

(shortly to be mentioned). Thus it will be seen that rather than having the pins for the'rollers suppor'tedat their one ends tothus provide a somewhatstronger' conabout the opening are swedged upwardly be seen in Fig. 10.

jfl'he swedged walls perform. two functions They permit the swedged wall about the stud (about to bementioned) :tmhe'stthereinso.the;

end; in this instance they arel'supported'at both allowing the stud to be rotated its quarter turn to place the springunder'tension and lock the parts together with a minimum amount -of effort.

Inasmuch as the entrance. face, working face,

seat and limiting walls; are duplicated on the stud, these faces eachcooperate with theirown roller tothereby provide a relatively strong fastener-l I The upperzend of the .stud or pilot H centers withinthe opening in the plate 59; thus'helping 'to guide thejstud into position.

Referring now for the moment to Fig. l llthere may be seena stud" that is similar to the stud shown in Fig. '8' with one addition, and that is a pilot 18' similar to the'pilot "H shown on the stud inFig. 13. ".lhe helices, seats and walls are all identical with that shown in thepreferredform. in Fig. v8,- but there is the additional pilot which will. center-l within the opening in the plate 59 to thus help. guide the stud into position in the same manner. that the pilot shown in Fig..l3 operates. p 1

It will be understood that I much prefer using a stud as shown in Fig-14 with this modified form of resilient memberas a pure rolling con-1 tact betweentheconical rollers and the stud provided with .the'helices and thelother various mentioned features can be effected Also, it takes 'bers where I have shown pins or studscwithl roller'sthereon which a'r illustrated as: either: being cylindrical or conical, I might useilplain studs which-would be fastened to'thei resilient member and dispense-with the cylindrical; or conical rollers and haveathe.camfacesfor: helices of the main stud'con'tact these small studs'of the resilient member to effect therlocking' and unlocking-of the fastener. Here, however, e14 though the construction would be; less :zc'ostly.

the. friction would be" greater, the istuds :wear

more quickly and it would 'take :more efforti-to lock and unlockv the fastener. 4 I From:the.foregoingit will be seenthatinfthe preferred and modifiedforms of fastener, .the

operating andlocking faces, etc.,: are.-incorpo.-'

rated inthe stud and the stud in turn engaging cylindrical or conical rollers, so thatthere .is no slippingor slidingaction, but .alwaysarolling contact both on the thefastenerr; y I. The modified form; of. resilient-- member is somewhat of a stronger construction,v as it has locking and unlocking fof anadditional bow plate and furthermore has the pins-that support. the .rollers -supported, at boththeir ends... 1.. iltznwill-also-beseen that after .the studsyare' oncew fastenedlin their plate; they. cannot become accidentally disengaged therefrom,2;but1on the other handmay be quickly turnedqeither, to.

a, locked, or unlocked position by. the .insertion of a :coinzinf the-kerf and then .therotatiVe movement applied.

In jtheipreferre'd' form anyundue load. placed on the spring would cause the rollers to bottom on the stud whereas in the modified form a portion of the spring member itself may bottom'on the plate .to. preventv any excessload being placed on the spring; I

' Manyvslight Chase's might be made witheu't in:.any ,w'ay: departing from .the spirit and scope ofthexinvention. q v Having .thus: described my invention, what. I

claimeas new and desire to secure .by-g-Letters Ratentisz 1. A fastener for holding two plates and: thelike. together, includinga resilient member havmg rollers secured :thereto, the-resilient member adapted to be; secured qto. oneplate, :a. CO? operable stud rotatablyv secured to'the other plate and said stud having entrance spaces, cam' faces .and seats formed ;.on' the, shank thereof, thecamfaces, of the stud overlying. said rollers whereby a part rotatiomof theestudwill cause thencam faces toIadvance on said rollers and place.- thegspring m'ember under tension; and said rollers fitting within saidxseats at-the end of the rotation'of the stud to thereby stud with relation to said rollers;

29A fastenerfor holding twoplates and the like -together, inc1u'ding a resilient memberhay-1 ing rollers secured thereto, the resilient member adaptedto' be secured to one plate, a cooperable stud secured in the other of 'saidplate's and the.

stud having entrance Spaceacamfsurfaces, seats and stop walls formed-on the shankithereofythe cam faces on the stud extending parallel with thej axislof the rollers and overly'ing'said rollers whereby apart rotation'of the stud Will'cause the; cam faces to' force said rollers inwardlyfand place the 'sprin 'g' member under' tension, said rollers fitting within said seats at the end of the rotation 'of the stud to thereby lock the stud with relation to'said rollers and the stop walls on the {stud :limiting the rotative' inovement of" I saidstud I 1; a:

. kiih r; '31 Atwoepartfastenerincluding astudhaving entrance spaces, advancing: cam surfaces :and seats formed ontheshankthereof,.together with a-resilient member having twooffset cooperating rollers angularly positioned with relation 'to' the axis of the stud soithat a partial rotation ofthe the rollers; and the-cam surfaces to placetheg;

resilient member under tension, snap the rollers within the seats andlock the stud with relation" to the rollers, and the stop wallscontacting with therollers and preventing thesame from being advanced beyond theirseats on' the stud.

5. A fastener-for holding two plates and the like together, including a stud, the stud adapted to be ro-tatably secured. to one plate, the shank of thestud provided with oppositely .disposed'em.

trance spaces, oppositely disposed cam surfaces adjacent the respective faces,.oppositely disposed seats adjacent the cam'surfaces andoppositely disposed stop walls adjacentthe seats,.a resilient member adapted to be secured to the other plate having cooperating offset rollers adapted to pass within said entrance spaces and to be acted on by the cam faces on a partial rotation of the stud to thereby place the resilient member under ten.- sionand'hold the plates tightly together.

6. A two-part fastener for holding plateszand.

the like including a stud, the said studadapted to be .rotatably secured to one plate,pthe shank of the stud provided at its outer end with oppo-: sitely" disposed. helices, oppositely disposed seats adjacent the helices and oppositely disposed stop walls adjacent the .seats, a. resilient member.

adapted to be secured to the other of said plates,-

the said resilient member having rollers adapted to fit within said helices .and be actedon by the walls thereof whereby a partial rotation of: the stud will, place the resilient member under ten.- sion and force-the plates tightly together. k

7.- A fastener for holding two plates and the? like together including a resilientmember hav ing;,oifset, rollers secured thereto, the resilient member adapted to be secured to one plate, a; a cooper-able stud rotatably secured to the other plate and having oppositely disposed-entrance; spaces,cam faces and seats for the offset rollers, a part of the ,walls, of thecam faces'overlying said rollers when the studis' positioned between them whereby equal increments of studrotation I will cause increments of stud advance along the, stud axis to thereby place the spring member under tension and pull the plates tightlyf toef gether. 8. A fastener for holding two plates'and the like to each other including a'resilient member having bowed reentrant ends adapted to be secured to one of'said plates, the said resilient: member also being bowed centrally, a bridge plate portion andsaidbridge plate, the bowed portion overlying said bowed central portion and I offset rollers secured between said central bowed' of the resilient member and the bridge plate being centrally perforated to receive a stud; together with a stud having cam faces overlying said rollers whereby a rotation of said stud will cause the cam faces operating on said rollers to place the said resilient member'under tensionwhile the locking seats will also releasably hold said rollers to thereby lock the stud with relation to said rollers when the spring member is under tension.

9. A fastener for holding two plates like together including a centrally bowed resilient member, a bowed plate, pins secured between the bowed plate and the bowed portion of the resilient member, rollers mounted on said pins, the bowed member being perforated, the rollers angularly positioned from the vertical and offset with relation to each other together with a stud having oppositely disposed entrance spaces, cam surfaces and locking seats adapted to cooperate with said rollers and to place said resilient member under tension and lock the same with relation to said stud when said stud is rotated one quarter turn from its entrant position.

10. A fastener for holding two plates and the like together including a stud, the stud adapted to be rotatably secured to one plate, the shank of the stud provided with oppositely disposed entrance spaces, oppositely disposed cam surfaces adjacent the respective'spaces, oppositely disposed seats adjacent the cam surfaces and oppositely disposed stop walls adjacent the seats, a resilient member adapted to be secured to the other plate and in spaced relation thereto, ccoperating offset rollers on the under surface of the said resilient member and adapted to pass within said entrance spaces and to be acted on by the cam faces on a partial rotation of the stud to thereby place the resilient member under tension and hold the plates tightly together, and the said rollers adapted to bottom on the plate to which the resilient member is secured if a predetermined load is exceeded.

11. A fastener for holding two plates and. the like together including a stud, the stud adapted to be rotatably fitted in one plate, the shank of the stud provided with oppositely disposed cam surfaces thereon, together with a resilient member adapted to be secured to the other plate and in spaced relation thereto, cooperating offset rollers on the under surfac of said resilient member and adapted to be acted on by the cam faces on said stud on a partial rotation thereof to thereby place the resilient member under ten sion and the said rollers adapted to bottom if the resilient member is subjected to an overload.

12. A fastener for holding two plates and the like together including a stud, the stud adapted to be rotatably fitted in one plate, the shank of the stud provided with oppositely disposed cam surfaces thereon, together with a resilient member adapted to be spacedly secured to the other of said plates, offset rollers on said resilient member and adapted to be acted on by the cam faces and the 13. A fastener for holding two plates and the like together including a stud, the stud adapted to be rotatably fitted in one plate, the shank of the stud provided with a pilot and oppositely disposed cam surfaces adjacent the pilot, seats adjacent the cam surfaces, together with a, resilient member adapted to be spacedly secured to the other of said plates, rollers on said resilient member and adapted to be acted on by'the cam faces on said stud on a partial rotation thereof to thereby place the resilient member under tension and force said rollers in said seats to hold the stud and resilient member in locked relation with each other and the said resilient member adapted to bottom if an overload is placed on said resilient member.

14. A two part fastener including a stud having oppositely disposed helices formed thereon,

axially extending concave locking seats adjacent the helices, a resilient member having cooperative means adapted to fit within said. helices whereby on a part rotation of the stud the resilient member will be placed under tension and the said cooperating means will snap within said axially extending seats at the completion of the rotation to thereby lock the stud with relation to its cooperating means.

15. In a fastener for holding two plates and the like together including a stud having oppositely disposed entrance spaces at its outer end, oppositely disposed helices registering with the respective entrance spaces, axially extending seats on the stud and at the remaining ends of the said helices, stop walls adjacent the seats and forming a part thereof and the said fastener provided with a head for rotating the same.

16. In a fastener for holding two plates and the like together, a stud having entrance spaces at its outer end, oppositely disposed cam faces in the form of partial threads registering at their one ends with the respective entrance spaces, axially extending seats formed adjacent said cam face and at the remaining ends of the said threads, the far walls of the seats extending in planes parallel with the axis of the stud and extending substantially throughout the length of the stud and forming stop walls and a head on said stud for rotating the same.

17. In a fastener for holding two plates and the like together a stud having a pilot formed on its outer end, the said stud also having oppositely disposed entrance spaces adjacent said pilot, op-

positely disposed helices registering with the respective entrance spaces, axially extending seats on the stud at the remaining ends of said helices, stop walls adjacent the seats and forming a part thereof and the said fastener provided with a head for rotating the same.

FORREST G. PURINTON. 

